﻿<!DOCTYPE html>
<html>
<head>
  <title>Magnifier</title>
  <!-- Copyright 1998-2021 by Northwoods Software Corporation. -->
  <meta name="description" content="Use a draggable Overview as a kind of magnifying lens." />
  <meta name="viewport" content="width=device-width, initial-scale=1">

  <style type="text/css">
    #myOverviewDiv {
      display: none;
      position: absolute;
      background-color: white;
      z-index: 300; /* make sure its in front */
      border: solid 1px blue;
      width: 200px;
      height: 200px;
      pointer-events: none;
    }
  </style>
  <script src="../release/go.js"></script>
  <script src="../assets/js/goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
  <script id="code">
    function init() {
      if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
      var $ = go.GraphObject.make;  // for conciseness in defining templates

      myDiagram =
        $(go.Diagram, "myDiagramDiv",  // the DIV HTML element
          {
            initialAutoScale: go.Diagram.Uniform,
            layout:
              $(go.TreeLayout,  // use a TreeLayout to position all of the nodes
                {
                  treeStyle: go.TreeLayout.StyleLastParents,
                  angle: 90,
                  layerSpacing: 80,
                  alternateAngle: 0,
                  alternateAlignment: go.TreeLayout.AlignmentStart,
                  alternateNodeIndent: 20,
                  alternateNodeIndentPastParent: 1,
                  alternateNodeSpacing: 20,
                  alternateLayerSpacing: 40,
                  alternateLayerSpacingParentOverlap: 1,
                  alternatePortSpot: new go.Spot(0, 0.999, 20, 0),
                  alternateChildPortSpot: go.Spot.Left
                })
          });

      // define Converters to be used for Bindings
      function theNationFlagConverter(nation) {
        return "https://www.nwoods.com/go/Flags/" + nation.toLowerCase().replace(/\s/g, "-") + "-flag.Png";
      }

      function theInfoTextConverter(info) {
        var str = "";
        if (info.title) str += "Title: " + info.title;
        if (info.headOf) str += "\n\nHead of: " + info.headOf;
        if (typeof info.boss === "number") {
          var bossinfo = myDiagram.model.findNodeDataForKey(info.boss);
          if (bossinfo !== null) {
            str += "\n\nReporting to: " + bossinfo.name;
          }
        }
        return str;
      }

      // define the Node template
      myDiagram.nodeTemplate =
        $(go.Node, "Auto",
          { isShadowed: true },
          // the outer shape for the node, surrounding the Table
          $(go.Shape, "Rectangle",
            new go.Binding("fill", "isHighlighted", function(h) { return h ? "red" : "azure"; }).ofObject()),
          // a table to contain the different parts of the node
          $(go.Panel, "Table",
            { margin: 4, maxSize: new go.Size(150, NaN) },
            // the two TextBlocks in column 0 both stretch in width
            // but align on the left side
            $(go.RowColumnDefinition,
              {
                column: 0,
                stretch: go.GraphObject.Horizontal,
                alignment: go.Spot.Left
              }),
            // the name
            $(go.TextBlock,
              {
                row: 0, column: 0,
                maxSize: new go.Size(120, NaN), margin: 2,
                font: "bold 8pt sans-serif",
                alignment: go.Spot.Top
              },
              new go.Binding("text", "name")),
            // the country flag
            $(go.Picture,
              {
                row: 0, column: 1,
                desiredSize: new go.Size(34, 26), margin: 2,
                imageStretch: go.GraphObject.Uniform,
                alignment: go.Spot.TopRight
              },
              new go.Binding("source", "nation", theNationFlagConverter)),
            // the additional textual information
            $(go.TextBlock,
              {
                row: 1, column: 0, columnSpan: 2,
                font: "8pt sans-serif"
              },
              new go.Binding("text", "", theInfoTextConverter))
          )  // end Table Panel
        );  // end Node

      // define the Link template, a simple orthogonal line
      myDiagram.linkTemplate =
        $(go.Link, go.Link.Orthogonal,
          { selectable: false },
          $(go.Shape, { stroke: '#222' }));  // the default black link shape


      // set up the nodeDataArray, describing each person/position
      var nodeDataArray = [
        { key: 0, name: "Ban Ki-moon 반기문", nation: "South Korea", title: "Secretary-General of the United Nations", headOf: "Secretariat" },
        { key: 1, boss: 0, name: "Patricia O'Brien", nation: "Ireland", title: "Under-Secretary-General for Legal Affairs and United Nations Legal Counsel", headOf: "Office of Legal Affairs" },
        { key: 3, boss: 1, name: "Peter Taksøe-Jensen", nation: "Denmark", title: "Assistant Secretary-General for Legal Affairs" },
        { key: 9, boss: 3, name: "Other Employees" },
        { key: 4, boss: 1, name: "Maria R. Vicien - Milburn", nation: "Argentina", title: "General Legal Division Director", headOf: "General Legal Division" },
        { key: 10, boss: 4, name: "Other Employees" },
        { key: 5, boss: 1, name: "Václav Mikulka", nation: "Czech Republic", title: "Codification Division Director", headOf: "Codification Division" },
        { key: 11, boss: 5, name: "Other Employees" },
        { key: 6, boss: 1, name: "Sergei Tarassenko", nation: "Russia", title: "Division for Ocean Affairs and the Law of the Sea Director", headOf: "Division for Ocean Affairs and the Law of the Sea" },
        { key: 12, boss: 6, name: "Alexandre Tagore Medeiros de Albuquerque", nation: "Brazil", title: "Chairman of the Commission on the Limits of the Continental Shelf", headOf: "The Commission on the Limits of the Continental Shelf" },
        { key: 17, boss: 12, name: "Peter F. Croker", nation: "Ireland", title: "Chairman of the Committee on Confidentiality", headOf: "The Committee on Confidentiality" },
        { key: 31, boss: 17, name: "Michael Anselme Marc Rosette", nation: "Seychelles", title: "Vice Chairman of the Committee on Confidentiality" },
        { key: 32, boss: 17, name: "Kensaku Tamaki", nation: "Japan", title: "Vice Chairman of the Committee on Confidentiality" },
        { key: 33, boss: 17, name: "Osvaldo Pedro Astiz", nation: "Argentina", title: "Member of the Committee on Confidentiality" },
        { key: 34, boss: 17, name: "Yuri Borisovitch Kazmin", nation: "Russia", title: "Member of the Committee on Confidentiality" },
        { key: 18, boss: 12, name: "Philip Alexander Symonds", nation: "Australia", title: "Chairman of the Committee on provision of scientific and technical advice to coastal States", headOf: "Committee on provision of scientific and technical advice to coastal States" },
        { key: 35, boss: 18, name: "Emmanuel Kalngui", nation: "Cameroon", title: "Vice Chairman of the Committee on provision of scientific and technical advice to coastal States" },
        { key: 36, boss: 18, name: "Sivaramakrishnan Rajan", nation: "India", title: "Vice Chairman of the Committee on provision of scientific and technical advice to coastal States" },
        { key: 37, boss: 18, name: "Francis L. Charles", nation: "Trinidad and Tobago", title: "Member of the Committee on provision of scientific and technical advice to costal States" },
        { key: 38, boss: 18, name: "Mihai Silviu German", nation: "Romania", title: "Member of the Committee on provision of scientific and technical advice to costal States" },
        { key: 19, boss: 12, name: "Lawrence Folajimi Awosika", nation: "Nigeria", title: "Vice Chairman of the Commission on the Limits of the Continental Shelf" },
        { key: 20, boss: 12, name: "Harald Brekke", nation: "Norway", title: "Vice Chairman of the Commission on the Limits of the Continental Shelf" },
        { key: 21, boss: 12, name: "Yong-Ahn Park", nation: "South Korea", title: "Vice Chairman of the Commission on the Limits of the Continental Shelf" },
        { key: 22, boss: 12, name: "Abu Bakar Jaafar", nation: "Malaysia", title: "Chairman of the Editorial Committee", headOf: "Editorial Committee" },
        { key: 23, boss: 12, name: "Galo Carrera Hurtado", nation: "Mexico", title: "Chairman of the Training Committee", headOf: "Training Committee" },
        { key: 24, boss: 12, name: "Indurlall Fagoonee", nation: "Mauritius", title: "Member of the Commission on the Limits of the Continental Shelf" },
        { key: 25, boss: 12, name: "George Jaoshvili", nation: "Georgia", title: "Member of the Commission on the Limits of the Continental Shelf" },
        { key: 26, boss: 12, name: "Wenzhang Lu", nation: "China", title: "Member of the Commission on the Limits of the Continental Shelf" },
        { key: 27, boss: 12, name: "Isaac Owusu Orudo", nation: "Ghana", title: "Member of the Commission on the Limits of the Continental Shelf" },
        { key: 28, boss: 12, name: "Fernando Manuel Maia Pimentel", nation: "Portugal", title: "Member of the Commission on the Limits of the Continental Shelf" },
        { key: 7, boss: 1, name: "Renaud Sorieul", nation: "France", title: "International Trade Law Division Director", headOf: "International Trade Law Division" },
        { key: 13, boss: 7, name: "Other Employees" },
        { key: 8, boss: 1, name: "Annebeth Rosenboom", nation: "Netherlands", title: "Treaty Section Chief", headOf: "Treaty Section" },
        { key: 14, boss: 8, name: "Bradford Smith", nation: "United States", title: "Substantive Legal Issues Head", headOf: "Substantive Legal Issues" },
        { key: 29, boss: 14, name: "Other Employees" },
        { key: 15, boss: 8, name: "Andrei Kolomoets", nation: "Russia", title: "Technical/Legal Issues Head", headOf: "Technical/Legal Issues" },
        { key: 30, boss: 15, name: "Other Employees" },
        { key: 16, boss: 8, name: "Other Employees" },
        { key: 2, boss: 0, name: "Heads of Other Offices/Departments" }
      ];

      // create the Model with data for the tree, and assign to the Diagram
      myDiagram.model =
        $(go.TreeModel,
          {
            nodeParentKeyProperty: "boss",  // this property refers to the parent node data
            nodeDataArray: nodeDataArray
          });
    }

    var myOverview = null;

    function showMagnifier() {
      var myOverviewDiv = document.getElementById("myOverviewDiv");
      if (myOverview === null || myOverviewDiv.style.display === "none") {
        // show DIV
        myOverviewDiv.style.display = "inline";
        myOverviewDiv.style.left = "0px";
        myOverviewDiv.style.top = (myDiagram.div.scrollHeight - myOverviewDiv.scrollHeight) + "px";
        if (myOverview !== null) return;

        // create Overview
        myOverview =
          go.GraphObject.make(go.Overview, myOverviewDiv,  // the HTML DIV element for the Overview
            {
              scrollMode: go.Diagram.InfiniteScroll,
              "box.visible": false,
              observed: myDiagram,   // tell it which Diagram to show
              // disable normal Overview functionality to make it act as a magnifying glass:
              initialScale: 2,  // zoom in even more than normal
              autoScale: go.Diagram.None,  // don't show whole observed Diagram
              hasHorizontalScrollbar: false,  // don't show any scrollbars
              hasVerticalScrollbar: false
            });

        // disable all mouse-down tools
        myOverview.toolManager.mouseDownTools.each(function(t) { t.isEnabled = false; });

        // handle mouse moves within the Overview by redirecting the events to the myDiagram
        myOverview.doMouseMove = function() {
          var pt = myOverview.lastInput.documentPoint.copy();
          var e = myDiagram.lastInput;
          e.documentPoint = pt;
          e.viewPoint = myDiagram.transformDocToView(e.documentPoint);
          myDiagram.toolManager.doMouseMove();
        };

        // implement the magnifying glass functionality, to have the Overview show part of the Diagram where the mouse is
        myDiagram.toolManager.doMouseMove = function() {
          go.ToolManager.prototype.doMouseMove.call(myDiagram.toolManager);
          var myOverviewDiv = document.getElementById("myOverviewDiv");
          if (myOverviewDiv.style.display !== "none") {
            var e = myDiagram.lastInput;
            var osize = myOverview.viewportBounds.size;
            myOverview.position = new go.Point(e.documentPoint.x - osize.width / 2, e.documentPoint.y - osize.height / 2);
            myOverviewDiv.style.left = (e.viewPoint.x - myOverviewDiv.scrollWidth / 2) + "px";
            myOverviewDiv.style.top = (e.viewPoint.y - myOverviewDiv.scrollHeight / 2) + "px";
          }
        };
      } else {
        // hide DIV
        myOverviewDiv.style.display = "none";
      }
    }
  </script>
</head>
<body onload="init()">
<div id="sample" style="position: relative;">
  <div id="myDiagramDiv" style="background-color: white; border: solid 1px black; width: 100%; height: 700px"></div>
  <div id="myOverviewDiv"></div> <!-- Styled in a <style> tag at the top of the html page -->
  <label><input type="checkbox" onclick="showMagnifier()" />Show Magnifier</label>
  <p>
    This variation of the <a href="orgChartStatic.html">Org Chart (Static)</a> sample
    uses the <a>Overview</a> diagram as a magnifying glass.
    The primary behavior of showing an observed Diagram is kept, but all other behaviors
    of the Overview are disabled.
  </p>
</div>
</body>
</html>